GDT:Orientation Overview

Author: Admin

Orientation Overview

Symbol	Orientation Overview
Type	Orientation
Category	Orientation
Standard	ASME Y14.5
Author	Admin
Datums	Required to establish orientation
Modifiers	Varies by control and feature type
Tolerance zone	Varies by control
Image	GDT-Orientation-Overview.svg
Common mistakes	Missing datum references; using orientation control where location control is required
Related

Summary

Orientation controls relate features to datums without defining location.

Scope

Use orientation controls to keep a feature parallel, perpendicular, or angled relative to a datum reference frame.

Controls in this category

• GDT:Parallelism
• GDT:Perpendicularity
• GDT:Angularity

When to use it

Use orientation controls when the part must align to a datum reference without specifying the exact location.

Common mistakes

• Omitting required datum references.
• Using orientation controls when true location must also be controlled.